Pump or engine



ingthe numeral 10 designates ajcasing of any Patented Apr. Z329 i931 arianna rarnnnnnnn, er unicaen, mariners, .assrenon'ro naar.. nnwann, on

^ v carence, trainers applica-uen fue@ septembefa?, ieee. semi no. aceras;

This invention relates to improvements inl pump or engine particularly adapted, though not necessarily limited in its use, as 'a corn-l pressor or in connection with pressure refrigerating systems and the like, and one vof the objects of the invention is to provide -an im-v proved engine'of the reciprocating type, the

- pistons' and cylinders being reciprocable one with respect to the other, and in lwhich any l@ desired number of co-operating pistonand cylinder elements may be employed.

, 'llo the attainment of'these ends and the accomplishment of' other newand useful ob-v jects as will appear, the invention consists in the features of novelty insulostantiallyv the construction, combination and arrangement of *the several .parts hereinafter more' fully described and claimed and shownin the accompanying drawing illustrating this inven v -20 tion, and in which Figure 1 isan irregular sectional View tali@V I ien on line 1'-1, Figure 3.

I on line` 2--2, Figure l", looking inl the direc,-

25 tion of the arrows.

' Figure 3 is a sectional lView taken on line .3-3,Figure1.'

Figure 4 is adeta'il sectionalview taken on line 4 4, Figure 2. c

Referring more particularly to the" drawdesired size and configuration and which is provided with an opening 11 in one side thereof and a corresponding opening 12. in the oppositevside. The opening 11 is. covered by means of a plate 13 while the opening 12, is

' covered by means of aplate 14 ,-the .plates beingsecured in position respectively by means ofv suitable fastening bolts 15-,-16, and

40 packing elements 17-18 are respectively provided between the plates 13 and 1 4 and the adjacent faces of the walls of the casing so as to form iuid tight joints.

ing 19 in which a shaft20 is journaled, the shaft extending through the casing 10 and being also journaled in a bearing 21 carried by the plate 14.

Within the casing and secured to the shaft 20 for rotation therewith' is a member .22

' Figure 2 is a' detail sectional View takenl Supported by the plate 13'is a hollow bearwhich is provided with cylinders 23 any number oifvwhich cylinders may be provided v and these cylinders are provided with ports 24 adapted to successively register with ports v 5-26 in the plate 13 and'which plate con'- Stitutesa valve plate. portion of the plate 13 is.sha'ped `to forml a bearing surface 27 with which a similar bearing surface 23 carried by the member 22 cooperates. vrlhe bearingsurfaces 27 and 28 are spaced tor a con- 50 siderable distance from the axis ot rotation' of the member 227 :tor a purpose to be hereinf after setforth. v v

-Reciprocable within the cylinders 23- are pistons `29.

Supported in any suitable manner, preferablyV by the plate 21, is a .cam 30 ,.which cam also encompasses thev shaft 20. The axis of theV cam 30 is spaced laterally from and' inclined to the axis of rotation ofthe shaft 70 20,- thecam3() being preferably disposed in close. proximity to the member 22.- v Encompassing the'cam 30 is an element 31 and ball bearings. 32e-33. may' be provided forthe element 31. Links 34 which constitute piston rods'are pivotally connected by one end as at 35 with the eleme 31-and the other ends are preferably provid d with balls -tons in therespeetiv'e cylin ers 23.l

In orderto hold the co-operating .surfaces no 27 and 28 of the valve late 13 and the adjacent face-of the cylin ersin Contact and to provide a. fluid tight'jointvthere isprovided a collar'37 which is secured `to the shaft 20 for rotation therewith and within the bear- @o ing 19. A'coil spring 38 encompassesthe shaft and is 4also located within thebearing.

One end of the spring rests a ainst ay portion of the bearing and the ot er end preferably against a ball bearing 39 which con- L00 tacts with thev collar 37. The stress of the spring 38 is such-that it will draw the member 22 toward theY plate 13. By arranging the Vbearing surfaces 27-28 of the plate 13 a considerable distance from the axis of 110-I tation ofthelmember 22, the member'22 will be prevented from :tilting with respect to the bearing surface 27 and under the stress of the spring 38. L v 'Connected wi hthe lport 26 in the valve plate 13 is'an outletopening40 by means' of which' the compressed fluid escapes from'r theY cylinders and connected with the portis an inlet VVport 41 through which the'` fluid to f be compressed is supplied to the cylinders.

These ports 2rand 26 areso arranged that aslthemember22 rotates the ports onpas'-v sages 24 in the cylinders `will successively communicate first with the port Y25 and then with the port 26.v DuringY the rotation of the member 2.2.and as'the respective cylinders communicate with the port 25, fluid willvrbe admittedthrough the inlet 4,1 into the respective cylinders. YAs' soon as the ports in the respective cylinders ass outof communi cation with the port25' t eperts in the cylinders will be ciosed,'which will occur justas the 4pistons start to move towards the ported f i' end of the 'cylinder so that 'the fluid Win be in the cylinders pass over the unported sun' compressed and this will occur as the ports face 27 zof thevalve .plate 13.` When the.

i ports inthe cylinders-pass into communicationl withlthe .port 26, which will occur just before the pistons 29'reach the limit of their inwardv stroke, the compressed charge will be forced, out of the port 26 and through the passage or port40. v

If desired an o il groove42 may be pro-- vided vin thrbearing member-19 which forms communication between the interior of the v. bearing and the interior of the casing 10 and an -oilfgroove 43 maybe provided in a vportion of the plate 14 so astoforin a meansy Wwhereby 'the shaft 20may-be lubricated.

a considerable distance from -the axis of the shaft, a. member connected with theshaft for rotation. therewith, ported cylinders carried with said member, a' reduced 'bearing surface on said member contacting with the rst recited bearing surface, resilient means oper-,

ating to maintain said bearing surfaces in contact, pistons 1n the cylinders, a stationary caml encompassing the shaft, the axis of said cambeing spaced laterallyfrom and inclined with respect to the axis of the shaft, an ele- I'nent freely rotatable-about the cam and said4 l shaft, and .piston rods pivotally connected with said element andv therespective' pistons.

2. In combination', a casing, one wall of the casing forminga ported 4valve plate, a

shaft extendingthrough the casing, a rotaryy member within the casing andhaving'cylinders arranged to successively connect with Zthe ports' of said plate, pistons in the eylinders, a stationary cam carried by the opposite wall of the casing and in which cam the shaft is Journaled, the axis of the cam being' spaced .laterallyl and inclined with respect tothe axis of the shaft, a member encompassing and-rotatable upon said cam, and'piston rods 'connecting the last said member and the respective pistons. p

In testimony whereof I-have signed my name to this specification, on this 19th day ofgSeptember, A. D. 1928. y

' ALBERT M. FREELAND.

In order to vary' the distance to which the pistons 29 may move toward the ported end of the respective cylinders, the element,18 i

may be removed and thicker or thinner similar elements-substituted Atherefnr or additional elements 18 may be provided between the plate 1 4 4and the adjacent wall of the casing' has beenylierein shown and described, it is to be understood thatvarious changes may be made in the-details of construction and in l the' combination and arrangementcf the severa-l parte, within the scope of the claims, without departing from the 'spirit of this invention. .A v

l `What is claimed as new is :f

1. In combination, a drive shaft,a support therefor, a reduced bearing surface connected with the l'support and encompassing the shaft l While-the preferredform of the invention A. 

